This IBM SYSTEM/34 DATA COMMUNICATIONS REFERENCE MANUAL PROGRAM NUMBER 5726-SS1 is a valuable resource for owners of Desktop Computers.  It provides detailed information on the communications capabilities of the machine, and how to use them.  The manual is written in English, and is compatible with IBM brand computers.  It covers a range of topics, including but not limited to data communication protocols, network interfaces, and programming interfaces.    With this manual, you can learn how to use the communications features of your IBM SYSTEM/34 to their full extent, and develop efficient and effective communication strategies.  Whether you are a programmer, a network administrator, or a casual user, this manual is an essential resource that will help you understand the capabilities and limitations of your machine.  I AM THE ONLY OWNER.  SMOKE FREE HOME.